import pandas as pd

def round_to_nearest_N(num, N):
    return N * (num // N)

def round_to_nearest_2(num):
    return 2 * (num // 2)

def round_to_nearest_3(num):
    return 3 * (num // 3)
def round_to_nearest_5(num):
    return round_to_nearest_N(num, 5)

